1. Department of Urology Shanghai Children's Hospital School of medicine Shanghai Jiao Tong University Shanghai 200240 China
2. Department of Urology Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine Shanghai 200233 China
3. Shanghai Eastern Institute of Urologic Reconstruction Shanghai 200233 China
4. Department of Urology Renji Hospital School of Medicine Shanghai Jiao Tong University Shanghai 200240 China
5. Department of Ultrasound in Medicine Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine Shanghai 200233 China
6. Institute of Microsurgery on Extremities Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine Shanghai 200233 China